BOULDER, Colo. - A Texas man accused of driving drunk the wrong way down the Diagonal Highway and causing a crash that seriously injured two people may face vehicular homicide charges if one of the victims dies.

Dean Carlson, 56, appeared in court Friday. He currently faces two counts of vehicular assault while driving under the influence and two counts of vehicular assault, reported the Daily Camera.

According to police, Carlson was driving north in the southbound lanes near 55th Street when he hit Daniel Mays and his girlfriend Sean Balog.

Mays remains in a coma at Denver Health and doctors are worried he may not survive much longer, the Camera reported.

If Mays dies of his injuries, the charges against Carlson will be changed from vehicular assault to vehicular homicide.

Friday, Carlson's attorney asked for a delay in his trial so they can look at his blood work.

Police said Carlson told him he remembered having a few drinks at the Old Chicago in Boulder around 7 p.m. and drank at several bars on the Pearl Street Mall.

Carlson told investigators he believes he got lost trying to find his hotel in Westminster and made a wrong turn onto the highway.

The Camera reported Carlson has three prior DUI convictions on his record.